U UL 924 STANDARD FOR SAFETY Emergency Lighting and Power Equipment ULCOPYRIGHTEDMATERIAL NOTAUTHORIZEDFORFURTHERREPRODUCTIONOR DISTRIBUTIONWITHOUTPERMISSIONFROMUL MAY 5, 2020 - UL 924 tr1 UL Standard for Safety for Emergency Lighting and Power Equipment, UL 924 Tenth Edition, Dated May 9, 2016 Summary of Topics This revision of ANSl/UL 924 dated May 5, 2020 includes the following changes: · Open Type Devices; 4.40.1, 8.2.1, 52.3, 66.2.1, 73.1.46, 76.1 · Electronic circuit fault assessment and functionality, 23.3, 28.1, 28.2, 30.1, 47.3 : Modification to a derangement signal activation condition; 28.2 : ELcDs with control functionality to independently monitor normal power status; Section 29A : ELCDs to be evaluated only for power status conditions; 29A.2 · Self-Testing/Self-Diagnostic Equipment Load Loss Detection Thresholds; 30.1, 74.4 : Derangement signal calibration for self-test equipment with variable output levels; 30.1.1, 74.5 · Flashing Exit Signs; 40.5, 40.6, Figure 40.1, Section 43.5 · Test methods for constant-current rated equipment; 45.2, 45.2.1, 45.2.2, 49.1, 52.10 : Clarifying markings and instructions for emergency air handling luminaires; 73.1.30, 76.2 : Adding the word "emergency" to citations for directly controlled luminaires; 4.13.1, 73.1.44, 73.1.45, Appendix B1 : Correction to LVLE (low voltage limited energy) definition and test program; 4.37, 50.1, 50.2 · Revise definition of "Service"; 4.53 : Polymeric enclosure resistance to impact testing; 10.2.1 : Supply wiring connections for PoE (Power over Ethernet) equipment; 17.1.1 : Additional battery compliance options; 22.2.1, 22.2.1.1, 22.2.1.2 : Test switch accessibility; 29.3 · Impedance Networks; 22.2.2, 33.1 : Guidance for non-Arabic character text-based exit signs; 40.8 : Clarification of dielectric voltage withstand test potentials; 56.1 : Simplifying the requirement for instructions to be provided with equipment; 73.1.11, 74.1, 74.6 : Temperature test measurement clarification and de-linking the ELcF test; 52.1, Table 52.1 · Editorial adjustments and corrections; 18.1.3, 31.3, Table 37.2, 48.7, 49.2, 49.3, 55.1, 76.1, 76.5, SA4.2 Text that has been changed in any manner or impacted by UL's electronic publishing system is marked with a vertical line in the margin. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated November 29, 2019 and Febraury 21, 2020. transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard "as is" without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or fitness for any purpose. In no event will UL be liable for any special, _incidental, consequential, indirect or similar damages, including loss of profits, lost savings,loss bf ldata, Tr anylother damages arising out of the use of or the inability to use this StandardReven if UL oRan lauthorized ULRrepresentativechas been advised of the DISTRIBUTIONWITHOUTPERMISSIONFROMUL tr2 MAY 5, 2020 - UL 924 possibility of such damage. In no event shall UL's liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of UL's Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable Standard on the purchaser's computer system. ULCOPYRIGHTEDMATERIAL NOTAUTHORIZEDFORFURTHERREPRODUCTIONOR DISTRIBUTIONWITHOUTPERMISSION FROM UL ANSI MAY 9,2016 (Title Page Reprinted: May 5, 2020) ANSI/UL 924-2020 1 UL 924 Standard for Emergency Lighting and Power Equipment The first, second, third, and fifth editions were titled Standard for Emergency Lighting Equipment. First Edition - December, 1958 Second Edition - May, 1973 Third Edition - October, 1973 Fourth Edition - April, 1977 Fifth Edition - Fe